Back welding
[化] 封底焊
🧩 词语组成解析
back
[bæk]
n. 背，背部;背面，反面;后面，后部;（椅子等的）靠背;
vt. 使后退;支持;加背书于;下赌注于;
vi. 后退;倒退;
adj. 背部的;后面的;以前的;拖欠的;
adv. 以前;向后地;
a. 焊的\\n[机] 熔接, 焊接, 锻接
🗣️ 情景例句
No, no. I turned it down because of me.
不 ，不。我因为我自己而拒绝了它。
Would you please hold the door open for me?
可以请你为我把门拉着吗？
The busmen have stated that the strike will continue until general agreement is reached about pay and working conditions.
司机们声称此次罢工将一直持续到就工资和工作条件问题达成全面协议的时候为止。